BEGIN{
	print "----------------------------------------------WELCOME TO VIT-----------------------------------------------------------"
	print "Roll_No\t\tName_of_student\t\tMath\t\tPhysics\t\tChemistry\t\tTotal\t\tGrade"
	print "-----------------------------------------------------------------------------------------------------------------------"
}
{
		total= $3 + $4 + $5 
		avg= total/3
		if ( avg >= 90)
		grade= "A"
		else if ( avg >= 75 && avg < 90 )
		grade= "B"
		else if ( avg >= 45 && avg <75 )
		grade= "C"
		else
		grade= "F"
		print $0"\t\t\t"total"\t\t"grade"\t"
}
END{
	print "------------------------------------------------THANK YOU--------------------------------------------------------------"
}
